Cliffz Hi my site 2 site vpn stopped working today here is the log and config on remote side .. thanks for any hint and help. Tue Sep 30 20:46:31 2014 Re-using pre-shared static key Tue Sep 30 20:46:31 2014 LZO compression initialized Tue Sep 30 20:46:33 2014 Preserving previous TUN/TAP instance: tun1 Tue Sep 30 20:46:33 2014 UDPv4 link local (bound): [undef]:1195 Tue Sep 30 20:46:33 2014 UDPv4 link remote: ####:1195 Tue Sep 30 20:47:33 2014 Inactivity timeout (--ping-restart), restarting Tue Sep 30 20:47:33 2014 SIGUSR1[soft,ping-restart] received, process restarting Tue Sep 30 20:47:35 2014 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Tue Sep 30 20:47:35 2014 Re-using pre-shared static key Tue Sep 30 20:47:35 2014 LZO compression initialized Tue Sep 30 20:47:37 2014 Preserving previous TUN/TAP instance: tun1 Tue Sep 30 20:47:37 2014 UDPv4 link local (bound): [undef]:1195 Tue Sep 30 20:47:37 2014 UDPv4 link remote: 206.116.29.23:1195 Tue Sep 30 20:48:09 2014 Authenticate/Decrypt packet error: missing authentication info Tue Sep 30 20:48:11 2014 Authenticate/Decrypt packet error: missing authentication info Tue Sep 30 20:48:15 2014 Authenticate/Decrypt packet error: missing authentication info [root@naunans openvpn]# Authenticate/Decrypt packet error: missing authentication info dev tun port 1195 remote remote.poweredbyclear.com 1195 ifconfig 10.8.222.41 10.8.222.40 route 172.24.213.0 255.255.255.0 comp-lzo keepalive 10 60 persist-key persist-tun user nobody group nobody secret static.key log-append /var/log/openvpn.log